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Designed in 1940 by Lúcio Costa. Inspired by the dwellings of the missionaries. Its veranda is roofed with clay tiles. The museum contains a rich collection of about a hundred sculptures of rare beauty, of sizes ranging from 15 cm to 2.20 m, collected by John Hugo Machado between 1939 and 1940.
Its centerpiece is the Church of St. Michael the Archangel, built in Baroque style, designed by Italian architect Gian Batista Primolli, begun in 1735 and took 10 years to complete, composed of three naves separated by two large archways and five altars with images of saints, coverage was clay tiles supported by wooden beams and, in front, a portico with arches and columns that displayed statues of the 12 apostles. The sandstone blocks were brought from a distance of 20 km. The tower, 25 meters tall, wore a tin rooster and five golden bells. Other highlights include a massive Missionary Cross, built from a single block of stone sandstone, and a 1-ton remaining bell.